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HelloOS.s
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HelloOS.s
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; HelloOS test file for COMS35102 Advanced OS
; uses nested processes, that need to be supported by the OS
AREA HelloOSTest, CODE, READONLY
EXPORT HelloOS ; symbol for linking to the OS
HelloOS
ADR r0, HelloOStext
SVC 0x04; print zero-terminated string
ADR r0, HelloWorld
SVC 0x05 ; create process
ADR r0, HelloOSdone
SVC 0x04
SVC 0x00 ; terminate process
HelloWorld
ADR r0, Hellotext
SVC 0x04 ; print zero-terminated string
ADR r0, HelloMars
SVC 0x05 ; create nested process
ADR r0, Hellodone
SVC 0x04
SVC 0x00 ; terminate process
HelloMars
ADR r0, HelloMtext
SVC 0x04 ; print zero-terminated string
ADR r0, HelloGalaxy
SVC 0x05 ; create nested process
ADR r0, HelloMdone
SVC 0x04
SVC 0x00 ; terminate process
HelloGalaxy
ADR r0, HelloGtext
SVC 0x04 ; print zero-terminated string
ADR r0, HelloGdone
SVC 0x04
SVC 0x00 ; terminate process
; DATA CONSTANTS
HelloOStext
DCB "\nHelloOS assembly test routine starting...\n",0
Hellotext
DCB "\nHello World!",0
HelloMtext
DCB "\nHello Mars!",0
HelloGtext
DCB "\nHello Galaxy!",0
HelloOSdone
DCB "\nHelloOS assembly test routine finished :)\n",0
Hellodone
DCB "\nHello World done",0
HelloMdone
DCB "\nHello Mars done",0
HelloGdone
DCB "\nHello Galaxy done",0
END